ㄨㄞˋwàiㄒㄧㄣxīn

  1. 異心史記··世家》:外心不敢失禮。」拍案驚奇·》:真心相待看看熟分不隄防外心。」

  2. 多邊形外接圓中心通常三角形外接圓中心內心

(of a married person)​ interest in a third person, (old)​ (of a minister etc)​ disloyal disposition, (math.)​ circumcenter (of a polygon)​
cercle circonscrit